C64 Repair Number 2 – I’m Still an Idiot

Commodore 64 Repair – When It’s Not the CIA or the PLA… This C64 arrived with a blue screen and a few suspicious past repairs, including chopped ROM legs and a mismatched CIA chip. After a quick inspection and a few educated guesses, I started working through the usual suspects: CIA, ROMs, CPU, PLA… But even after swapping and testing most of the major ICs, the machine still wouldn’t boot correctly—until I tried one last thing. This repair takes a few twists and turns, and ends with a surprising culprit